//Primeiras linhas de código, trabalhando //com switch/case

//Mux control pins
int r0 = 2;
int r1 = 3;
int r2 = 4;

//int s0 = 2;
//int s1 = 3;
//int s2 = 4;


int saida = A0;

int t=50;
int x;

void setup()

{
pinMode(r0, OUTPUT);
pinMode(r1, OUTPUT);
pinMode(r2, OUTPUT);
pinMode(saida, OUTPUT);

digitalWrite(r0, LOW);
digitalWrite(r1, LOW);
digitalWrite(r2, LOW);
digitalWrite(saida, LOW);

Serial.begin(9600);


}

void loop()

{
for (x=0; x<8; x++)
{
toca();
}
for (x=7; x>=0; x--)
{
toca();
}
}
void toca()
{
switch (x)
{
case 0:
{
digitalWrite(r0, LOW);
digitalWrite(r1, LOW);
digitalWrite(r2, LOW);
}
break;
case 1:
{
digitalWrite(r0, HIGH);
digitalWrite(r1, LOW);
digitalWrite(r2, LOW);
}
break;
case 2:
{
digitalWrite(r0, LOW);
digitalWrite(r1, HIGH);
digitalWrite(r2, LOW);
}
break;
case 3:
{
digitalWrite(r0, HIGH);
digitalWrite(r1, HIGH);
digitalWrite(r2, LOW);
}
break;
case 4:
{
digitalWrite(r0, LOW);
digitalWrite(r1, LOW);
digitalWrite(r2, HIGH);
}
break;
case 5:
{
digitalWrite(r0, HIGH);
digitalWrite(r1, LOW);
digitalWrite(r2, HIGH);
}
break;
case 6:
{
digitalWrite(r0, LOW);
digitalWrite(r1, HIGH);
digitalWrite(r2, HIGH);
}
break;
case 7:
{
digitalWrite(r0, HIGH);
digitalWrite(r1, HIGH);
digitalWrite(r2, HIGH);
}
break;
}
digitalWrite(saida, HIGH);
delay(t);
digitalWrite(saida, LOW);
}